Invested in a Junkyard 4l80e
01-16-2012, 06:54 PM
#43
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A local guy just got a 4L80E and was telling me he was told by the builder that he could run it wide open, locked up in 4th gear. Thats behind 408 with an 80mm turbo. That should give you an idea of how much stronger they are than the 60E's.
01-17-2012, 08:35 PM
#49
How do you know a triple disc has more clutch surface area? Compared to what?
OK,
Typical 245mm converter, billet cover, single disc lockup has a clutch surface area that is about 9" outside diameter, 1-1.5" wide friction material, and a 9" apply piston with approx 4" out of the center of the piston.
You can calculate the friction area, and the apply area if you have accurate numbers.
A triple disc simply adds friction area, same apply area generally.
There are 3 common ways to increase holding capacity of a clutch. Each has advantages and drawbacks.
You increase the apply pressure, apply area, and/or friction area.
You are limited on the pressure somewhat by the overall pressure a trans makes and usually it is regulated down to a lesser pressure for converter apply.
Apply area is going to be limited mostly by how big the converter is, you're not going to have a 20" apply piston in a 9" converter.
Friction area is also limited by converter diameter and how many discs you can fit, 1-3-5, etc.
But let's throw a curveball...
I use a converter that has a 12" billet cover, friction material that is almost 4" wide, and has the corresponding ~12" apply piston, then is mated to a 9-11" pump depending on application.
I assure you it can be locked up at WOT with 1000 HP/TQ.
So,
the point is that there is more than one way to "make it happen", and marketing doesn't trump physics.
01-17-2012, 09:14 PM
#50
It is loaded...
How do you know a triple disc has more clutch surface area? Compared to what?
OK,
Typical 245mm converter, billet cover, single disc lockup has a clutch surface area that is about 9" outside diameter, 1-1.5" wide friction material, and a 9" apply piston with approx 4" out of the center of the piston.
You can calculate the friction area, and the apply area if you have accurate numbers.
A triple disc simply adds friction area, same apply area generally.
There are 3 common ways to increase holding capacity of a clutch. Each has advantages and drawbacks.
You increase the apply pressure, apply area, and/or friction area.
You are limited on the pressure somewhat by the overall pressure a trans makes and usually it is regulated down to a lesser pressure for converter apply.
Apply area is going to be limited mostly by how big the converter is, you're not going to have a 20" apply piston in a 9" converter.
Friction area is also limited by converter diameter and how many discs you can fit, 1-3-5, etc.
But let's throw a curveball...
I use a converter that has a 12" billet cover, friction material that is almost 4" wide, and has the corresponding ~12" apply piston, then is mated to a 9-11" pump depending on application.
I assure you it can be locked up at WOT with 1000 HP/TQ.
So,
the point is that there is more than one way to "make it happen", and marketing doesn't trump physics.
How do you know a triple disc has more clutch surface area? Compared to what?
OK,
Typical 245mm converter, billet cover, single disc lockup has a clutch surface area that is about 9" outside diameter, 1-1.5" wide friction material, and a 9" apply piston with approx 4" out of the center of the piston.
You can calculate the friction area, and the apply area if you have accurate numbers.
A triple disc simply adds friction area, same apply area generally.
There are 3 common ways to increase holding capacity of a clutch. Each has advantages and drawbacks.
You increase the apply pressure, apply area, and/or friction area.
You are limited on the pressure somewhat by the overall pressure a trans makes and usually it is regulated down to a lesser pressure for converter apply.
Apply area is going to be limited mostly by how big the converter is, you're not going to have a 20" apply piston in a 9" converter.
Friction area is also limited by converter diameter and how many discs you can fit, 1-3-5, etc.
But let's throw a curveball...
I use a converter that has a 12" billet cover, friction material that is almost 4" wide, and has the corresponding ~12" apply piston, then is mated to a 9-11" pump depending on application.
I assure you it can be locked up at WOT with 1000 HP/TQ.
So,
the point is that there is more than one way to "make it happen", and marketing doesn't trump physics.
01-17-2012, 09:26 PM
#52
All single discs aren't equal. Ability to lockup at WOT has many more factors than how many discs the converter has.
01-18-2012, 06:31 PM
#56
I have a PSI conversion stand along wiring harness for my LS swap. Is there a way to convert my harness so the PCM can controlled the trans? I just purchased a 4l80e off ebay and was going to switch it over to full manual since I've been manually shifting my th400 for years with 90% of it being street driven miles.
09-09-2013, 11:21 AM
#58
I finally got my car on the road with the 80e in automatic mode. To be honest, I don't like the shifting characteristics of it and I'm about to pull the trigger on a manual valve body. Can someone give me some pointers on how to set this thing up for street/strip duty? Hell, I haven't even did a burnout with this trans because of how it shifts lol. I like being able to select the gear I want when I want it.
09-10-2013, 01:08 PM
#59
I finally got my car on the road with the 80e in automatic mode. To be honest, I don't like the shifting characteristics of it and I'm about to pull the trigger on a manual valve body. Can someone give me some pointers on how to set this thing up for street/strip duty? Hell, I haven't even did a burnout with this trans because of how it shifts lol. I like being able to select the gear I want when I want it.
09-10-2013, 03:07 PM
#60
4L80E full man box We use a external full manual box on the 4l80E its very simple 12 V to the red wire and when you around the brown wire it activates lock up. They work excellent never had any issues with them.
You can call us and talk to a live person. Up until 10 PM Eastern standard time , Monday through Sunday.
Thank You,
"Mad Dog" Lou
Mad Dog Transmissions
Phone 770-781-0949
Fax 770-781-0969 maddoglou454@aol.com
You can call us and talk to a live person. Up until 10 PM Eastern standard time , Monday through Sunday.
Thank You,
"Mad Dog" Lou
Mad Dog Transmissions
Phone 770-781-0949
Fax 770-781-0969 maddoglou454@aol.com
